“For the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and of spirit, of joints and of marrow, and discerning the thoughts and intentions of the heart.” (Hebrews 4:12)
You would expect a book that is divine and living would in fact be active, and so it is. Paul writes in 1 Thess. 2:13 that the word of God does work. Jeremiah writes: ““Is not my word like fire, declares the LORD, and like a hammer that breaks the rock into pieces?” (Jeremiah 23:29)
God’s word is powerful. The word translated here as powerful is the source of our word energy. It means to say that God’s word has God’s power, his energy.
Because it is God’s word, it is an undefeatable word. The Bible has all the essentials of the life and power of God to do his work! Isaiah says that the word of God does not return void; it does his work, powerfully so (Is. 55). The Word of God is powerful.